This comprehensive service repair manual for the Citroën C4, covering model years 2004 to 2009, is an invaluable resource for both car owners with basic mechanical skills and independent automotive service professionals. The manual provides detailed specifications and procedures equivalent to those used by authorized Citroën dealerships, empowering users to understand and address vehicle maintenance and repair tasks effectively. The manual delves into every aspect of the Citroën C4, including general information, engine service and overhauling, transmission, chassis, body, wiring, fuel system, emission control, induction, mechanical components, control systems, transmission and differentials, troubleshooting and diagnostics, steering and suspension, brakes, ABS, and complete specifications and torque settings. It covers essential service work procedures and offers practical guidance on diagnosing common engine faults, evaluating repair approaches, testing suspected parts using expert techniques, tracing and verifying wiring diagrams, understanding engine management systems, and identifying practical solutions to problems such as no-starts, hesitations, and stalling. The manual also provides valuable insights into common vehicle issues, enabling users to address smaller problems before they escalate, ensuring optimal vehicle performance and longevity. This manual is a valuable tool for anyone seeking to gain a deep understanding of their Citroën C4 and perform repairs and maintenance effectively.

The Citroën C4, a compact car produced by the French automaker Citroën from 2004 to 2010, marked a significant shift in the company's design language. Departing from the more conservative styling of its predecessors, the C4 introduced a more modern and dynamic aesthetic. Its striking exterior featured a distinctive, sloping roofline, a bold grille with the signature double chevron logo, and angular headlights. Inside, the cabin offered a spacious and comfortable environment with a driver-focused layout, a large center console, and a range of available features, including climate control, navigation, and a premium sound system. While sharing its platform with the Peugeot 307, the C4 stood out with its unique styling and a focus on comfort and practicality. The Citroën C4 was offered with a range of gasoline and diesel engines, satisfying diverse driving needs. The petrol options included 1.4 and 1.6-liter engines, offering a balance of fuel efficiency and performance. Diesel power came in the form of 1.6 and 2.0-liter engines, known for their strong torque and impressive fuel economy. The C4 was available in both hatchback and sedan body styles, further expanding its appeal to a wider audience. While the C4 was lauded for its stylish design, comfortable interior, and fuel-efficient engines, it was also praised for its ride quality and handling. Its independent suspension system, paired with carefully tuned steering, provided a balance of comfort and responsiveness that was uncommon in its segment. The Citroën C4 represented a successful evolution for the brand, blending style, technology, and practicality into a compelling package that captured the attention of drivers seeking a unique and enjoyable driving experience.